Rinnai Heat Pump Water Heater - 50 Gallon

Efficient + Sustainable.

The Rinnai Electric Heat Pump Water Heater (REHP Series) is an all‑electric water heating solution built to the highest efficiency standards, helping reduce energy usage and operating costs while delivering reliable performance. ENERGY STAR® 5.0 qualified with a Uniform Energy Factor of 3.75 and fully Title 24 compliant, this advanced hybrid system uses a micro‑channel heat exchanger condenser to optimize heat transfer and maximize energy savings. Designed for comfort and convenience, it features whisper‑quiet operation, an interactive LED controller, and ergonomic handles for easier handling and installation. Demand/Response capability allows homeowners to reduce energy use during peak demand hours, while the duct‑ready, zero‑clearance installation design makes it easy to integrate into a wide range of spaces and replace existing tank water heaters. The 50‑gallon tank delivers a first‑hour recovery of up to 73 gallons, ensuring consistent hot water for busy households. Built for long‑term dependability, the REHP Series is backed by a residential warranty of 10 years on the tank, 10 years on parts, and 1 year on in‑home labor, offering peace of mind with every installation.

This heat pump water heater uses electricity to move heat from the surrounding air into the water, rather than generating heat directly. The technology works like a refrigerator in reverse—pulling heat from the air and transferring it into a storage tank of water. Because moving heat is far more efficient than creating it, heat pump water heaters use significantly less electricity than traditional electric resistance water heaters.

Compared to standard electric water heaters, heat pump water heaters can deliver two to four times more efficiency, which can translate into lower utility bills by reducing the electricity needed for water heating.

Most residential heat pump water heaters sold today are integrated (all‑in‑one) systems and include backup electric resistance elements to ensure reliable hot water during periods of high demand or colder conditions.